Who is Rachel Sexton from Deception Point and what is their importance?

Rachel Sexton is an intelligence analyst with the National Reconnaissance Office in Washington, DC. She prepares briefs that are read by the president, his advisers and other high-ranking military and intelligence officials. Rachel is the daughter of presidential hopeful, Senator Sedgewick Sexton, but their relationship is strained, as Rachel believes her father is selfish, greedy, and a liar. Rachel's mother died a few years before in a car accident, and Rachel blames her father for the death.